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1. WO2016141329 - ACCURATELY DETECTING LOW CURRENT THRESHOLD

Publication Number WO/2016/141329
Publication Date 09.09.2016
International Application No. PCT/US2016/020981
International Filing Date 04.03.2016
IPC
G01R 19/00 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
G01R 19/165 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
CPC
G01R 19/0092
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
0092measuring current only
G01R 19/16519
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
16504characterised by the components employed
16519using FET's
G01R 19/16538
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
16533characterised by the application
16538in AC or DC supplies
G01R 19/16552
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
16533characterised by the application
16538in AC or DC supplies
16552in I.C. power supplies
G01R 19/16571
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
16566Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
16571comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
H03K 5/153
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
5Manipulating of pulses not covered by one of the other main groups of this subclass
153Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
Applicants
  • LINEAR TECHNOLOGY CORPORATION [US]/[US]
Inventors
  • GARDNER, Andrew, Joseph
  • DWELLEY, David, McLean
Agents
  • BROWN, Marc, E.
Priority Data
62/128,87705.03.2015US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ACCURATELY DETECTING LOW CURRENT THRESHOLD
(FR) DÉTECTION PRÉCISE DE SEUIL DE COURANT FAIBLE
Abstract
(EN)
A threshold detection circuit may sense when current between a power supply and a load reaches a current threshold level. The threshold detection circuit may include a transistor in series with the load; a feedback circuit that causes the voltage drop across the transistor to be constant while the transistor is conducting current between the power supply and the load; a constant current source that delivers a constant current into the load; and a comparator that indicates when the voltage drop across the transistor falls below a voltage threshold level.
(FR)
L'invention concerne un circuit de détection de seuil qui peut détecter lorsqu'un courant entre une alimentation électrique et une charge atteint un niveau de seuil de courant. Le circuit de détection de seuil peut comprendre un transistor en série avec la charge ; un circuit de rétroaction qui amène la chute de tension dans le transistor à être constante tandis que le transistor conduit le courant entre l'alimentation électrique et la charge ; une source de courant constant qui délivre un courant constant dans la charge ; et un comparateur qui indique lorsque la chute de tension dans le transistor chute au-dessous d'un niveau de seuil de tension.
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